Blower for boilers.



IrC. BENNETT.

BLOWERUFOR BQILERS. APPLICATION man MAR. s, 1916.

.Pmnted oet. 24

2 SHEETS-SHEET l.

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BLOWER FOR BOILERS.-

APPLICATION FILED MAR. 6. 191s.

Patented Oct. 24, 1916.

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JAMES C. BENNETT, 0F DETROIT, MICHIGAN.

BLOWER FOR BOLERS.

i ,scatta Specification of Let-ters lateiit.

Patented @et 241C, 1916.

Application led March 6, 1916. Serial No. 82,300.

To all whom t 'may concern:

Be it known that l, JAMES C. BENNETT, a citizen of the United States of America, residing at Detroit, inthe county of Wayne and State of Michigan, have invented certainnew and useful Improvements in Blowers for Boilers, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to blowers for boilers, and the primary object of my invention is to provide a blower which may be advantageously used-in connection with a horizontal return tube boileror a boiler ot the marine type, the blower also ,being applicable to other types of boilers by a slight modification in the shape and disposition ot' jet arms forming part oit the blower.

Another object ot my invention is to provide a steam blower with novel jet arms which may be oscillate'd whereby the arms will serve all of the tubes of a tlue sheet and thoroughly remove soot, incrustations and other matter from the ues or tubes of a boiler.

A 'further object ont my invention is to furnish a blower of the above type with a novel reciprocatory valve which permits of one ot' the jet arms of the blower being used independent of the other jet arm, thereby conserving steam pressure and allowing the blower to directly and indirectlyl cleanse tubes orv flues of a boiler.

A still further object of my invention is to provide a blower that can be easily and quickly installed, readily operated when occasion requires, and maintained in an operative position within a boiler setting.

The above are a few of the objects attained by the novel construction to be hereinafter described, and reference will now be had to the drawing, wherein there are `illustrated the preferred embodiments of my invention, but it is to be understood that the structural elements are susceptible to such variations and modilications as fall within the scope of the appended claims.

In the drawings, Figure 1 is a view of the front end of a horizontal return tube boiler, showing the jet arms of the blower; Fig. 2 is a side elevation of the blower; Fig. 3 is an enlarged longitudinal sectional view ot a portion of the same, illustrating a reciprocatory valve; Fig. l is a cross sectional view of the same taken onthe line IV--IV oi" Fig. 3; Fig. 5 is a view of the end ot' a boiler of the marine type, illustrating a blower installation, and Fig. G is a side elevation of one of the blowers.

Referring first to Figs. 1 to 4 inclusive, 1

-denotes a boiler of the horizontal return tube type having a tube or flue sheet 2, tubes or tlues 3, and a boiler setting et provided with a/door 5 whereby easy' access may be had to the space between the flue sheet 2 and the boiler setting. Suitably secured to the inner side of the boiler setting- 4 is a bracket coperating with the boiler setting in supporting the inner end ot a steam supply pipe 7. As a matter of good construction. the steam supply pipe 7 enters the boiler setting 4 above the door 5 and extends downwardly to a point in proximity to the crab of the flue sheet 2. The inner end of the supply pipe 7 has a horizontally disposed elbow 8 provided with a stuffing box 9 and a connection 10 for a short pipe 11 extending toward the flue sheet 2. The pipe 11 supports a longitudinally disposed valve -body 12 having angle connections 13 and 14 with a by-path 15 establishing communication between the valve body 12 and the angle connection 13. Reciprocable in the valve body 12 is a tubular valve 16 having a central spider`17 connected to the end of a valve rod 18. The rod 18 extends through the pipe 11, the elbow 8 and 'the stuing box 9, and through the door 5.

On the outer end of the valve rod 18 is a wheel or hand piece 19 which may be removed when the door 5 is to be opened. To prevent. the reoiprocatory valve 16y from rotating within the valve body 12, said valve has a longitudinal groove or key-way 20, and extending into said groove or keyway is a pin or key 21 carried by the valve body l2. It is through the medium of the valve rod 18 that the valve 16 may be Ieciprocated in the valve body 12, to close the angle connection 14 and allow the by-path 15 to communicate with the valve body or close the by.path 15 and establish communication between the angle'connection '14 and the valve body. It is also through the medium of the rod 18 that the valve body 12 and the pipell may be oscillated or rocked relative to the elbow 8. Connected to the angle connections 13 and 1l of the valve body 12 are irregularlyv shaped jet arms, cach having right angularly disposed portions 22 and 23 and a. portion 2l disposed at an obtuse'angle to the portion 23. These irregularlv shaped arms are in a plane parallel to the flue sheet 2- and the outer ends of said arms are closed by caps 25 and the sides thereof confronting the flue sheet 2 provided with jets or nozzles 26.

-The two jet arms shown in Fig. 1 are adapte-d to serve all of the fl-ues 3 when the blower is oscillated. One arm serves practically half of the lues and the other arm the other half, with each arm shaped to conform to the outline of the marginal flues of the flue" sheet. By reference to Fig. 1 it will be noted that the portions 22 and 23 of the left arm are in front of those marginal flues at the lower part of the Hue sheet 2 and to the left of the crab, while the portion 24C of the arm is` in front of the first vertical row of flues, consequently all of these marginal iues can be thoroughly blown. Assuming that the blower is in the position shown in Fig. l and steam is admitted to the elbow 8, the steam passes through the pipe 11 into the valve body 12, through the by-path 15 into the jet arm of the angle connection 13. The steam is' blown into the iiues 3 on the left hand side of the boiler and the steam lnay return through the filles at the right hand side of the boiler', thereby blowing the flues direct and indirectly with one arm which is gradually swung clockwise. When the blower arms assume a position the reverse of that shown in Fig. 1, the valve 16 is reciprocated to close the by-path 15 and establish communication between the angle connection ll and the. valve body, whereby steam'will be admitted to the right jet arm to directly blow iues on. the' right hand side of the boiler. l/Vith the right jet arm in action the blower is swung counter-clockwise, and when said operations are repeated, the flues 3 are thoroughly cleansed of soot and other foreign matter. lith only one of the arms in operation at a time a head of steam may be maintained with suflicient pressure to thoroughly cleanse the flues and during these operations it is only necessary for the fireman or attendant ofthe boiler to manipulate the wheel or hand piece 19 at the outer side of the door 5.

Reference will now be had to Figs. 5 and 6 showing an installation of blowers in connection witha boiler of the marine type. The blowers are very similar to the blower just described with the exception that different brackets 27 are used and arms 28 and 29 of each blower are shaped to serve the iues of the boiler. The arms 28 conform to the outline of the` marginal iues of the marine boiler, and the arms 29 are shaped to serve those filles not reached by the arms 28, also an uptake 30 of the boiler. The blowers are alternately operated and the arms 28 and 29 swung in front of the flue sheet, with the arms alternately ejecting steam which enters the fiues of the boiler and thoroughly cleanses the same.

I am aware of steam ejecting arms swinging in parallelism with a flue sheet, but such arms have heretofore only served certain of the "flues of the boiler, leaving marginal fines unblown, consequently the rated eiliciency of a boiler could not be maintained. The arms herein illustrated confront the marginal fines of a boiler and consequently each and every flue is properly blown. By. first blowing one side of the boiler and then the other side, the steam is directly and indirectly used and in consequence of such flue treatment, a boiler can be expeditiously and economically cleaned.

llVhat I claim is:-

1. In a blower for boilers, jet arms adapted to be swung in front of a flue sheet and shaped to conform to the outline of the ends of the marginal'flues, means adapted for moving said arms, and means adapted for alternately admitting steam to said arms.

2. In a blower for boilers, jet arms adapted to be swung in front of a flue sheet and shaped to conform to the outline of the ends of themarginal iues, and means adapted for swinging said arms and alternately admitting steam thereto.

3. In a blower for boilers, an elbow adapted to receive steam, an oscillatory valve body carried thereby, jet arms in communication with said valve body, and a reciprocatory valve in said valve body adapted to alternately admit steam to said jet arms.

4. In a blower for boilers, an elbow adapted'to receive steam, an oscillatory valve body carried thereby and provided with ay bypath, a jet arm in communication with the by-path of said valve body, a jet arm communicating direct with said valve body, and a reciprocatory valve in said valve body adapted to alternately admit steam to said jet arms.

5. In a blower for boilers, an elbow adapted to receive steam, an oscillatory valve body carried thereby, jet arms in communication with said valve body, a reciprocatory valve in said valve body adapted to alternately admit steam to said jet arms, and means adapted for oscillating said valve body and reciprocating the valve therein.

6. The combination with a boiler setting, and a boiler having a flue sheet, of an elbow 1,202,471 il ll.

v between the flue sheet of said boiler and the said elbow for movingI said valve and osoil- 13 latng said valve body.

ln testimony whereof l alix my signature in presence of two witnesses.

JAMES C. BENNETT.

Witnesses:

ANNA M. Donn, KARL H. BUTLER. 

